Centrifgal apparatus



J. W. PHILLIPS.

CENTRIFUGAL APPARATUS.

APPUCATION FILED JUNE IT, 1920.

Patented June 28, 1921.

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J. w. PHILLIPS. A CENTBIFUGAL APPARATUS.

APPLICATION FILED JUNE IT. 1920. I A 1,382,930. Patented June 28, 1921.

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LANDRETH, F PHILADEL? em onnrnarrrenn nrr'rus.

intense a lication their time it,

I To all whom it concern:

Be it known that I, J OHN W. Pnnmrrs, a citizen or the United States,residing in Meriden, county of New Haven State of Connecticut, haveinvented certain new and useful Improvements in Centrifugal Apparatus,of which the following is a specification.

My invention relates to centrifugal apparatus for operating upon liquidby centrifu all force to separate therefrom contents difilering from theliquid in specific gravity.

My invention resides in centrifugal apparatus, particularly of thecontinuously operating type; in wh1ch there is provided means forpositively transporting and discharging separated material, such means,in the example of my invention herein described, comprisin ascrewrotating at a speed differing from'tne speed of the centrifugaldrum.

. l /ly invention resides in centrifugal apparatus oi the characterhereinafter described and claimed.

For an illustration of one of the various forms my invention may take,reference is to be had to the accompanying drawings in I which Figure 1is a longitudinal sectional view, partly in elevation, of apparatusembodying my invention.

Fig. is a cross sectional view on the line 2'"?-2 of Fig. 1, some partsshown in elevation.

Fig. 3 is a horizontal sectional view taken on the line 3-3 of ll, someparts being shown in plan. I

Fig. 4t 15 a vertical cross sectional view talaen on the line l l ofFig. 1.

Referring to the drawings, upon the base 1 are disposed the bearin s 2,2 for the shaft 3 rotated by an suitable means, as for example the puley l. Secured by key 5 to the shaft 3 is the hub of the spider 6 on theouter ends of whose arms is secured by screws 7 the inner drum 8 which,in the example illustrated, is cylindrical. At its other end the drum 3is secured by screws 9 to a flange upon the hollow conical member 10secured .by key 11 to the Shaft 3 which rotates the inner drum 8 and itsconical end or eatension 10.

lnclosin the drum 8 is the outer drum 12 secured as y bolts 13 to themember it hav ing the hub 15 bearing upon the shaft 3. The member 1.4:forms an end closure for the Specification of Letters Eatent. Padmmtgfil Jung 2%,, 1921 1320. Serial No. 389,569.

drum 12 and has the thickened portion 16 having the inwardly extendingflange 17 having the aperture 18 surrounding and aced from the shaft 3.,'lhe part 16 has the outwardly extending flange or lip 19. Between theflange 17 and the hub of the member l iiis formed an inlet chamber 20into which is delivered the liquid to be operated upon through pipe 21extending through the aperture 18 With the chamber 20 communicate theoutwardly extending channels or passages 22 in the member 14:, thesepassages delivering at 23 into the space between the inner and outerdrums 8 and 12. Between the passages 22 are formed within the member i lthe passages 24 communicat ingwith the interior of the drum 3 andextending to the outside of the member ll, lb, these passages 24discharging liquid to the exterior of the member 16 within the housing25 inclosing the end of the drum 12 and its end closure 14:, 16 andcommunicating with the discharge passage or outlet 26 in the base 1'.

At its other end the outer drum 12 is secured to the outer hollowconical member or extension 27 terminating in the hub 28 bearing uponthe shaft 3 and itself having the hub 29 of smaller diameter to which issecured by key 30 the gear 31 which meshes with and is driven by thegear 32 upon the counter-shaft 33 supported in the bearings 34;, 35supported upon the base i Disposed upon shaft 33 is the third gear 36,the key 37 securing both gears 32 and 36 to the shaft 33. Meshing withand driving the gear 36 is the gear 38 secured by key 39 to the shaft 3.A housing 40 secured to the and .35..

At the end of the conical member 27 is disposed a housing ll into whichseparated material is delivered from the space between the conicalmembers 10 and 27 through the discharge apertures 42 in the member 27into the housing l1, which conununicates with the discharge outlet 43 inthe base 1.

@perating in the space between drums 8 and 12 and their conical ends orextensions 10 and 27 for trans orting separated material from right tole t, it in the form of a helix encircling and secured tothe members 8and 10 by bolts 45. Thatportion of member at on drum 8 is of uniformpitch, and that portion on extension 10 may also be of uniform pitch,but preferably isof progressively increasing pitch from the larger tothe smaller end ofapertures 46 whereby liquid from the space between thedrums 8 and 12 passes through the apertures 46 to the interior of thedrum 8. Discharge apertures 42 and the inner edge of aperture 18 are ata substantially less radial distance from the axis of the shaft 3 thanare the discharge apertures 46, thus preventing the discharge of liquldthrough apertures 42. On the exterior of the drum 8 at its right end,Fig. 1, is secured a suitable number of'outwardly projecting agitators,paddles or members 47 suitably spaced circumferentially from each other.

The operatlon is as follows:

The shaft 3 is rotated at suitable speed by the pulley 4, thus drivingthe drum 8 and cone 10 and the attached screw 44 at a .predeterminedsuitably high speed. The gear -38 drives the gear 36, which in turndrives the gear 32, which in turn drives the gear 31 which rotates thecone 27 and the outer drum 12 at a speed which, due to the differentialgearing described, is slightly less than the speed of rotation of thedrum 8, cone 10 and screw 44. For example, the shaft 3 and therefore thedrum 8, cone 10 and screw 44 may rotate at a speed of 906 revolutions erminute, and the. drum 12 and cone 27 at a slightly different speed, 'forexample, 900 revolutions per'minute. Both the inner and outer drums andcones rotate in the same direction, which direction is such that the 7Screw 44 will tend to move separated mate rial from the right toward theleft, as viewed in Fig. 1.

The liquid to be operated upon, as sewage,

cupy a region of less diameter nearer the outer surface of the drum 8.The solids or semi-solids, as the sludge of sewage, so separated bycentrifugal action, are moved from right toward the left by the conveyerscrew 44, and due to the progressively increasing pitch of screw 44 onextension 10 is carried forward along the wall of conical extension 27against the centrifugal force and discharged through apertures 42. Thesesolids or semi-solids, or both, as sewage sludge, is accordinglydelivered throughout the length of the drum 8 and thence through thespace between the cones 10 and 27 to the left end of the a paratus,where it is discharged through t e apertures 42 into the housing 41 andis delivered through the discharge outlet 43. The clarified liquid alsoprogresses from right to left in the space between the drums 8 and 12,but due to its greater fluidity, is not carried out through apertures42, but forms a layer of substantially uniform thickness on the wall ofdrum 12 which is retained by conical member 27. This layer increases inthickness 'as material is supplied through pipe 21 until it completelyfills the space between drums 8 and 12, whereupon clarified liquidpasses through apertures 46 into the interior of the drum 8 againstwhose inner wall the clarified liquid is held by centrifugal action andpasses to-, ward the right through the space between the arms of thespider 6, thence out through the passages 24 to. the exterior of themember 16 into the housing 25, the liquid as it dischar es through thepassages 24 flowing outwar ly by centrifugal force, but being retainedby the housing 25 to the bottom of which it drops and passesout throughdischarge outlet 26. The rib or flange 19 com fines the liquid deliveredinto the housing 25, preventing it from flowing to the left of s theflan e 19, where substantial quantities tatable co-axial drums, meansfor feeding material between said drums, means for pos- 1t1velyadvancing material between sald drums, and means for separately removlngseparated materials from between said drums comprising an outlet throughthe outer drum for one of-the separated materials and a passage frombetween said drums to the interior of the inner drum for another of saidmaterials, and a discharge from the interior of said inner drum for saidother of said materials.

2. Centrifugal apparatus comprising inner and outer co-axial drums,means for rotating said drums in the same direction at different ratesof speed, means for feeding liquid between said drums adjacent one endthereof, 'means for positively advancing said liquid toward the otherend of said drums, and means for separately Withdrawing said liquid 'andmaterial separated therefrom from between said drums comprising anoutlet for said material anda liquid passage from between said drums tothe interior of said inner drum, and a liquid discharge fromthe interiorof said inner drum.

3. Centrifugal apparatus comprising an inner cylindrical drum and anoutercylindrical drum, said drums being co-axial, means for rotatingsaid drums in the same direction at difl'erentrates of speed, means forfeeding materials of difi'erent densities to be separated between saiddrums adjacent one end thereof, means for positively advancing saidmaterials toward the other end of said drums, an opening at said otherend of said outer drum for d1scharging the material of greater density,and an opening in said inner drum for discharging material of lesserdensity into the interior of said inner drum, and a discharge outletfrom the interior of said inner drum.

4. Centrifugal apparatus comprising horizontally disposed inner andouter co-axial drums, means for rotating said drums in the samedirection at difierent rates of speed, means for feeding materials to beseparated between said drums, a helical rib on said inner drumapproaching said outer drum, and means for separately dischargingseparated materials comprising a passage for a separated materialthrough the outer drum and a passage for another separated material intoand through the interior of said inner drum.

5. Centrifugal apparatus comprising an inner drum and an outer drumco-axial with said inner drum, converging co-axial extensions onadjacent ends of said drums, means for rotating said drums andextensions in the same direction at diderent rates or speed, means forfeeding material between said drums adjacent their ends opposite saidextensions, means for advancing said material between said drums to saidextensions and between said extensions toward the Vertex thereof, apassage for separated material trom between said drums into the interiorof said inner drum, and a discharge for said s' arated material. -lromthe interior of said inner drum adjacent said end opposite saidextensions t"). Centrifugal apparatus comprising inner and outer coaxialcylindrical drums, means ,for rotating said drums in the same directionat diilerent rates of speed, a helical rib of pitch on one oi saiddrums, said helix approaching the surface of the other drum, headstructure at an end of said drums having a passage through whichmaterial is delivered to the space between said drums, a passage forseparated material from between said drums into the interior of saidinner drum,

and a passage for separated material from the interior or said innerdrum through said head structure. D

7. Centrifugal apparatus comprising coaxial rotatable cylindrical drums,co-axial conical extensions on adjacent ends of said cylindrical drums,mea-ns' for rotating said drums and conical extensions in the same directions at diillerent speeds, means for feeding material between saiddrums at the end remote from said conical extensions, a helical rib onthe inner of said cylindrical drums extending close to said outer drumadapted to advance material between said drums toward said conicalextensions, and a helical rib on the inner ofsaid conical extensionshaving a progressively increasing -pitch toward the vertex of saidextension.

8. Centrifugal apparatus comprising in-' ner and outer coaxialhorizontally disposed cylindrical drums, co-axial conical extensions onadjacent ends of said drums, means for rotating said drums andextensions in the same direction, said inner drum and extension rotatingat greater speed than said outer drum and extension, means for feedingmaterial between said drums, a helical rib of uniform pitch on saidinner drum approaching said outer drum adapted to advance materialbetween said drums toward said conical extensions, and a helical rib onthe conicalextension of said inner drum approaching the conicalextension on said outer drum, said last named helical rib hay:- ing aprogressively increasing pitch from the end of said inner drum to theVertex 0t said conical extension. I c 9. Centrifugal apparatuscomprising inner and outer co-axial cylindrical drums, conicalextensions on adjacent ends of said drums, the vertex or said conicalemensions being remote from the ends of said drums,

means "for rotating said inner drum with its conical extension and saidouter drum with its conical extension in the same direction at differentrates of speed, means for steeding material between said drums, meansfor advancing said material between said drums toward said conicalextensions and between at different rates of speed, said inner drum Hilland extension rota-ting at greater speed than said outer drum andextension, means for feeding material between said drinns adjacent theend remote from said extensions, a helical'rib on said inner drumadapted to I convey said material toward said conical pitch approachingthe vertex of said extension adapted to convey material toward saidvertex, a discharge opening in said inner drum spaced from the endthereof to which material is fed, and a discharge opening in saidouter'extension at a substantially less distance from the axis thereofthan is said first named discharge opening from said axis.

11. Centrifugalapparatus comprising coaxial drums spaced from eachother, means for rotating said drums at'dilferent speeds, ascreW on oneof said drums in the space between them for advancing materiallongitudinally thereof, a passage from between said drums to theinterior of said inner drum, head structure closing said drums at thesame end and rotating with one of them, a passage through said headstructure for said material from the interior of said inner drum to theexterior thereof, and an independent passage in said for drivingsaiddrums and their extensionsat different speeds, a screw disposed in thespace between said drums and their extensions and rotatable with one ofthem, head structure at the opposite end of said drums and rotating withone of them, a passage in said head structure for delivering materialinto the space'between said drums, a passage from the space between saiddrums into the interior of said inner drum, and a passage through saidhead" structure from the interior of said inner drum. I

In testimony whereof I have hereunto affixed-my signature this 10th dayof June, 1920.

JUHN W. PHILLIPS.

